Data Contents Distribution System

1. A data contents distribution system comprising: a contents distribution server which puts contents and trial contents of the contents in question on a Web site on a network and a client side device which reproduces said trial contents to confirm the summaries or the details of the contents before obtaining the contents, wherein said contents distribution server comprises: a contents distribution element which conducts streaming-distribution of at least said trial contents, a detection element which detects and outputs a degree of user's interest in trial contents, a contents estimation element which determines a user's estimation of said contents based on the output of said detection element, and a feed back element which feeds back the user's estimation determined by said contents estimation element to the relevant contents on said Web site, wherein said client side device comprises: an element which automatically transmits a trial contents reproduction stop signal to said data contents distribution server, when said client device stops reproduction of trial contents, wherein said detection element in said distribution server recognizes a reproduction time of said trial contents when said detection element detects the reproduction stop signal, and the detection element detects the degree of user's interest in said trial contents based on the reproduction time of said trial contents.

2. A data contents distribution server comprising: a Web site which puts contents and trial contents of the contents in question on a network to be distributed to a client side device, wherein the client side device reproduces said trial contents to confirm the summaries of the contents before obtaining the contents, a contents distribution element which conducts streaming-distribution of at least said trial contents, a detection element which detects and outputs a degree of a user's interest in said trial contents, a contents estimation value determination element which determines and outputs an estimation value of said trial contents based on the output of said detection element, and an update element which updates estimation of contents on said Web site based on the output of said contents estimation value determination element, wherein said client side device comprises: an element which automatically transmits a trial contents reproduction stop signal to said data contents distribution server, when said client side device stops reproduction of trial contents received from the Web site, wherein said detection element in said distribution server recognizes a reproduction time of said trial contents when said detection element detects the reproduction stop signal, and the detection element detects the degree of user's interest in said trial contents based on the reproduction time of said trial contents.